Credit: The Associated Press

An anti-government protester wearing a mask depicting the Monster Inc. character Sulley drives a motorbike through a barricade set up by fellow protesters, in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements. More than 40 people have been killed in almost two months of unrest in Venezuela. (AP Photo/Fernando Llano)

Credit: The Associated Press

A water canon sprays government protesters trying to reach the Interior Ministry, in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements, and after almost two months of unrest nationwide in which more than 40 people have been killed. (AP Photo/Fernando Llano)

Credit: The Associated Press

Anti-government protesters make their way to the Interior Ministry, before clashing with National Guards who blocked them in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements, and after almost two months of unrest nationwide in which more than 40 people have been killed. (AP Photo/Ariana Cubillos)

Credit: The Associated Press

A masked anti-government protester lobs a tear gas canister launched by security forces during clashes in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements. More than 40 people have been killed in almost two months of unrest in Venezuela. (AP Photo/Fernando Llano)

Credit: The Associated Press

A water canon sprays government protesters trying to reach the Interior Ministry, in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements, and after almost two months of unrest nationwide in which more than 40 people have been killed. (AP Photo/Fernando Llano)

Credit: The Associated Press

An anti-government protester holds a shield with nails protruding from it as he protects himself from tear gas canisters fired by security forces blocking an opposition march from reaching the Interior Minister in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements, and after almost two months of unrest nationwide in which more than 40 people have been killed. (AP Photo/Ariana Cubillos)

Credit: The Associated Press

Anti-government protesters shield themselves from tear gas canisters as security forces disperse an opposition march and block them from reaching the Interior Ministry in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements. More than 40 people have been killed in almost two months of unrest in Venezuela. (AP Photo/Ariana Cubillos)

Credit: The Associated Press

Anti-government protesters face off with security forces blocking an opposition march from reaching the Interior Ministry, in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements. More than 40 people have been killed in almost two months of unrest in Venezuela. (AP Photo/Ariana Cubillos)

Credit: The Associated Press

Anti-government protesters make their way to the Interior Ministry, before clashing with National Guards who blocked them in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements, and after almost two months of unrest nationwide in which more than 40 people have been killed. (AP Photo/Ariana Cubillos)

Credit: The Associated Press

An anti-government protester wearing a Venezuelan flag picks up a tear gas canister fired by security forces trying to disperse an opposition demonstration, blocking it from reaching the Interior Ministry, in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements, and after almost two months of unrest nationwide in which more than 40 people have been killed. (AP Photo/Ariana Cubillos)

Credit: The Associated Press

An anti-government protester is taken away on a motorcycle by other demonstrators after injuring his leg during clashes with security forces in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements, and after almost two months of unrest nationwide in which more than 40 people have been killed. (AP Photo/Ariana Cubillos)

Credit: The Associated Press

An anti-government protester raises his violin before National Guards, as he yells not to shoot at protesters, creating a brief pause during clashes in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements, and after almost two months of unrest nationwide in which more than 40 people have been killed. (AP Photo/Ariana Cubillos)

Credit: The Associated Press

Security forces fire tear gas at anti-government protesters in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements. More than 40 people have been killed in almost two months of unrest in Venezuela. (AP Photo/Fernando Llano)

Credit: The Associated Press

Anti-government protesters use homemade shields to protect themselves from tear gas fired by security forces blocking them from reaching the Interior Ministry, in Caracas, Venezuela, Thursday, May 18, 2017. The blue shield at center is fashioned in the likeness of the cover of Venezuela's constitution. The protest in Caracas comes after almost two months of unrest nationwide in which more than 40 people have been killed. (AP Photo/Ariana Cubillos)

Credit: The Associated Press

Anti-government protesters shield themselves from sprays of water as security forces try to disperse them, in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements. More than 40 people have been killed in almost two months of unrest in Venezuela. (AP Photo/Fernando Llano)

Credit: The Associated Press

Anti-government protesters march to the Interior Ministry, in Caracas, Venezuela, Thursday, May 18, 2017. The protest in Caracas comes after a tumultuous 24 hours of looting and protests in the western state of Tachira that led the government to send in troop reinforcements. More than 40 people have been killed in almost two months of unrest in Venezuela. (AP Photo/Fernando Llano)

BOGOTA, Colombia — The U.S. on Thursday slapped new sanctions on eight members of Venezuela's Supreme Court, accusing them of abusing power and damaging their nation's democratic fabric as the Trump administration raises concerns that socialist President Nicolas Maduro is moving toward one-party, authoritarian rule.

Those blacklisted by the Treasury Department include Maikel Moreno, the president of the government-packed Supreme Court, as well as all seven justices who signed a ruling in late March stripping the opposition-controlled congress of its last remaining powers.